xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: s390: allow user space to handle instr 0x0000

Browse Source 
We will use illegal instruction 0x0000 for handling 2 byte sw breakpoints
from user space. As it can be enabled dynamically via a capability,
let's move setting of ICTL_OPEREXC to the post creation step, so we avoid
any races when enabling that capability just while adding new cpus.

Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand
2016-06-21 14:19:51 +02:00
committed by Christian Borntraeger
parent af1bae5497
commit 6502a34cfd
5 changed files with 43 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/s390/kvm/intercept.c
View File

@@ -359,6 +359,9 @@ static int handle_operexc(struct kvm_vcpu *vcpu)
test_kvm_facility(vcpu->kvm, 74))
return handle_sthyi(vcpu);
if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0)
return -EOPNOTSUPP;
return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
}